Answer
$\left[\begin{array}{lll}
0 & 12 & -20\\
4 & 8 & 24
\end{array}\right]$
Work Step by Step
If $k$ is a real number and $A$ is an $m$ by $n$ matrix,
the matrix $kA$ is the $m$ by $n$ matrix formed by multiplying each entry $a_{ij}$ in $A$ by $k$.
$4A=4\left[\begin{array}{lll}
0 & 3 & -5\\
1 & 2 & 6
\end{array}\right]=\left[\begin{array}{lll}
4\cdot 0 & 4\cdot 3 & 4\cdot(-5)\\
4\cdot 1 & 4\cdot 2 & 4\cdot 6
\end{array}\right]$
$=\left[\begin{array}{lll}
0 & 12 & -20\\
4 & 8 & 24
\end{array}\right]$
